Senior Backend Engineer, Test Automation

We are hiring a Senior Backend Engineer for Test Automation for a game studio in Prague and Bratislava. The studio is building a large cross-platform strategy game for mobile and PC with one of the biggest mobile game publishers in the world. Nearly 400 people work on the project across Europe.

You will make sure the game's backend stays fast and stable under real player load. You don't need game industry experience. You need strong backend and performance skills.

What you will do

• Build systems that test the performance, scalability and reliability of backend services on AWS.
  
• Define targets for latency, throughput and error rates, and check them under realistic load.
  
• Build tools that simulate production: many services talking to each other, high concurrency and network problems.
  
• Run load, stress and endurance tests inside CI/CD, so problems are caught before release.
  
• Find bottlenecks using metrics, logs and tracing, and work with teams to fix them.
  
• Set the testing strategy across backend services: unit tests, integration tests with test containers, and clear rules for each layer.
  
• Use AI tools in daily work, from planning to code review.
  

Requirements

• 5+ years as a backend or distributed systems engineer, with a strong interest in testing and performance.
  
• Experience running highly available, high-traffic or real-time systems.
  
• Strong Python, including async programming and concurrency.
  
• Good knowledge of distributed systems: service communication, event-driven design, failure modes and resilience.
  
• Experience with Redis or DynamoDB, and with REST or gRPC APIs.
  
• AWS and Docker.
  
• CI/CD, automated testing and observability tools like Datadog.
  
• Hands-on use of AI coding tools.
  

Benefits

• Full-time employment contract in Czechia or Slovakia.
  
• Hybrid work from modern offices in Prague or Bratislava.
  
• A senior role on a large international project with a world-class publisher.
  
• Company hardware and benefits.